CN104667683A - Graded purification device and graded purification method for dusty gas - Google Patents
Graded purification device and graded purification method for dusty gas Download PDFInfo
- Publication number
- CN104667683A CN104667683A CN201310631552.8A CN201310631552A CN104667683A CN 104667683 A CN104667683 A CN 104667683A CN 201310631552 A CN201310631552 A CN 201310631552A CN 104667683 A CN104667683 A CN 104667683A
- Authority
- CN
- China
- Prior art keywords
- gas
- water
- spray column
- scrubber
- temperature
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Landscapes
- Treating Waste Gases (AREA)
- Separation Of Particles Using Liquids (AREA)
Abstract
The invention discloses a graded purification device and graded purification method for dusty gas. The graded purification device comprises a spray tower, a venturi scrubber, a separator and a foam scrubber connected orderly. In the graded purification method, the graded purification device is used. The method comprises the following steps: orderly introducing to-be-treated gas into the spray tower, scrubbing, further scrubbing through the venturi scrubber, separating through the separator, and finally, scrubbing in the foam scrubber. Water temperature in the spray tower is 10-200 DEG C, lower than the temperature of the to-be-treated gas, 0.001-10L of water is used for per cubic meter of the to-be-treated gas; water temperature in the venture scrubber is 10-200 DEG C, lower than the gas temperature, and 0.001-10L of water is used for per cubic meter of primarily treated gas; and water temperature in the foam scrubber is 0-200 DEG C, lower than the gas temperature. Removal rate of ultrafine particles by adopting the purification method provided by the invention is 95% or more, and the content of fine ash in clean synthetic gas is 1.0mg/Nm<3> or less.
Description
Technical field
The present invention relates to a kind of stage purification equipment of dusty gas and the stage purification method of dusty gas.
Background technology
Based on the needs of industrial production and environmental protection, dusty gas continuous workshop section or before entering air after entering, often needs to carry out purified treatment, to meet industrial production and airborne release to the requirement of dust burdening in gas.According to the physics and chemistry feature of ash particle in technological property and requirement and gas, actual industrial process has defined different dusty gas process for purifying.
Wet scrubbing dedusting has relatively high removal efficiency to the thin ash being greater than 1 μm.When not bery high, the thin ash content of proportion of ash in dusty gas is more but be less than that the ultra-fine ash content of 1 μm is lower, ash particle has certain hydrophily and requirement for the dust burdening in gas after dedusting is lower, wet scrubbing dust arrester can be selected, such as: the gas that the thermal conversion processes of the Solid carbonaceous material such as coal is produced, the technique described in more options.But, when dusty gas ash content is higher, be less than the ultra-fine grey accounting of 1 μm great and hydrophobicity that is thin ash particle is stronger time, above-mentioned technique is difficult to reach desirable clean-up effect, such as: adopt ash coal by powdered coal pressuring gasified production Clean synthesis gas, just inapplicable above-mentioned technique.
In prior art, for being less than removing of 1 μm of ultra-fine grain in gas, main path is before cleaner, arrange pretreatment facility, is removed after making it grow up into larger particles by physics or chemical action.But the removal effect of this technique is not good, be less than the removal efficiency of 1 μm of ultra-fine grain less than 60% in dusty gas, the content processing the thin ash in the clean synthesis gas obtained is 150mg/m
3, what be greater than requirement is less than 1mg/Nm about ash content thin in clean synthesis gas
3standard, and the method easily causes the clogging of the equipment of wet scrubbing process for purifying, have impact on treatment effect further, thus has a strong impact on industrial production.
Summary of the invention
Technical problem to be solved by this invention is to overcome in prior art, higher for ash gas ash content, to be less than 1 μm ultra-fine grey accounting is great and treatment effeciency that the is dusty gas that hydrophobicity that is thin ash particle is stronger is not high, the ratio of less than 1 μm ultra-fine ash after process in gas is large, and easily cause the defect of the blocking of the equipment of process for purifying, provide a kind of stage purification equipment of dusty gas and the stage purification method of dusty gas.The stage purification method of dusty gas of the present invention substantially increases in dusty gas the removal efficiency being less than 1 μm of ultra-fine grain, and removal efficiency reaches more than 95%, and the content processing the thin ash in the clean synthesis gas obtained is 1.0mg/Nm
3below, can not cause the blocking of foam scrubber, technique is simple and convenient, can meet different industrial needs simultaneously.
An object of the present invention is, provides a kind of stage purification equipment of dusty gas, and described stage purification equipment comprises the spray column, a Venturi Scrubber, a separator and the foam scrubber that connect successively.
It will be understood by those skilled in the art that: in the present invention, described spray column can be independent spray column, also can also be the spray column with other device coupled of upstream process, described upstream process refers to the upstream process of the routine of the process for purifying of this area dusty gas.
In the present invention, described spray column is the spray column of this area routine.Described spray column preferably comprises a spray column tower body, a spraying layer, a first liquid import, one first gas feed, one first gas vent and one first wastewater outlet.Preferably, described spraying layer is positioned at the top of described spray column tower body, and is connected with described first liquid import.Preferably, the first described gas feed and described first liquid import are all positioned at the side of described spray column tower body, and the first described gas feed is positioned at the below of described first liquid import.Preferably, the first described gas vent is positioned at the top of described spray column tower body.Preferably, the first described wastewater outlet is positioned at the bottom of described spray column tower body.
In the present invention, described Venturi Scrubber is also known as Venturi scrubber.Described Venturi Scrubber is the Venturi Scrubber of this area routine.
Preferably, described Venturi Scrubber comprises a washing portion, a syngas tube, a grey water pipe and an escape pipe.Preferably, described syngas tube is positioned at a side in described washing portion; Described escape pipe is positioned at another side in described washing portion; Described grey water pipe is positioned at the top in described washing portion; Water jet and the described syngas tube of described grey water pipe are interconnected, a sleeve pipe is provided with in described syngas tube, the water jet of described grey water pipe is relative with the air inlet of described sleeve pipe, and the water jet place described in neighbour of described grey water pipe is provided with a cyclone; Described sleeve pipe comprises the convergent portion be connected successively, a larynx neck and a flaring portion along airflow direction, the bore in described convergent portion reduces gradually along airflow direction, described larynx neck is hollow cylindrical, and the bore in described flaring portion increases gradually along airflow direction.
Wherein, preferably, the diameter of described syngas tube is D, and the diameter D of described syngas tube is 300-800mm.The water jet of described grey water pipe is preferably 0.1D ~ 0.2D apart from the length H1 of described larynx neck, is more preferably 0.15D.The length H2 of described larynx neck is preferably 0.1D ~ 0.2D, is more preferably 0.15D.Described cyclone is preferably 0.1D ~ 0.2D apart from the distance H3 of the water jet of described grey water pipe, is more preferably 0.15D.The length H4 in described flaring portion is preferably 0.5D ~ 4.2D, is more preferably 2.5D.The diameter D1 of described larynx neck is preferably 0.2D ~ 0.5D, is more preferably 0.3D.
Wherein, the angle of throat α in described convergent portion is preferably 20 °-60 °, is more preferably 37 °; The extended corner β in described flaring portion is preferably 5 °-30 °, is more preferably 10 °.
In the present invention, described separator is the separator of this area routine, is preferably cyclone separator.Described separator preferably comprises a separation unit, one second gas feed, one second gas vent and one second wastewater outlet.Preferably, the second described gas feed is positioned at the side of described separation unit.Preferably, the second described gas vent is positioned at the top of described separation unit.Preferably, the second described wastewater outlet is positioned at the bottom of described separation unit.
In the present invention, described foam scrubber is the foam scrubber of this area routine.Preferably, described foam scrubber comprises a scrubbing tower, one the 3rd gas feed, one the 3rd gas vent, one the 3rd liquid-inlet, one the 3rd wastewater outlet and a reservoir.Preferably, the 3rd described gas feed is positioned at the side of described scrubbing tower.Preferably, the 3rd described liquid-inlet is positioned at the side of described scrubbing tower.More preferably, the 3rd described gas feed and the 3rd described gas vent lay respectively at the both sides of the opposition of described scrubbing tower.Preferably, the 3rd described gas vent is positioned at the top of described scrubbing tower.Preferably, described reservoir is positioned at the bottom of described scrubbing tower.Preferably, the 3rd described wastewater outlet is positioned at the bottom of described scrubbing tower, and is connected with described reservoir.
In the present invention, described foam scrubber is preferably foam scrubber claimed in Chinese patent CN203128516U.Foam scrubber claimed in this patent is all applicable to the present invention.
As of the present invention one preferably example: in described scrubbing tower, layer communicates with each other every being provided with successively from top to bottom: one for removing the demister that drop is carried secretly, first paragraph column plate layer and the spraying layer slightly washed for gas-liquid contact carrying out fine purifiation for realizing gas-liquid contact; The upright position of the 3rd described gas feed is between described spraying layer and described reservoir; The upright position of the 3rd described liquid-inlet is between described demister and the first described column plate layer.
As a better example of the present invention: in described scrubbing tower, layer communicates with each other every being provided with successively from top to bottom: one for removing the demister that drop is carried secretly, the one first paragraph column plate layer carrying out fine purifiation for realizing gas-liquid contact, one for the second segment column plate layer of secondary fine purifiation and a spraying layer slightly washed for gas-liquid contact; The upright position of the 3rd described gas feed is between described spraying layer and described reservoir; The upright position of the 3rd described liquid-inlet is between described demister and the first described column plate layer; Described first paragraph column plate layer, second segment column plate layer and spraying layer communicate.
In the present invention, first gas vent of described spray column is connected with the import of the syngas tube of described Venturi Scrubber, the escape pipe of described Venturi Scrubber is connected with the second gas feed of described separator, and the second gas vent of described separator is connected with the 3rd gas feed of described foam scrubber.
Those skilled in the art all it is to be understood that in the present invention, and the connection between each equipment is generally and is communicated with by pipeline.
Described stage purification equipment preferably also comprises a water circulating pump.Described water circulating pump is connected with the reservoir of described foam scrubber.
Two of object of the present invention is, provides a kind of stage purification method of dusty gas, and described method uses the stage purification equipment of dusty gas as above; Described stage purification method comprises the following steps: passed into by pending gas in described spray column, after washing, obtain at the first gas outlet of described spray column and just process gas, described first process gas washs through described Venturi Scrubber, be separated through described separator again, obtain reprocessing gas, described reprocessing gas enters foam scrubber washing;
Wherein, the temperature of the water in described spray column is lower than the temperature of described pending gas 10 DEG C ~ and 200 DEG C, the consumption of the water in described spray column is: the pending gas of every cubic metre uses the water of 0.001 ~ 10L; The temperature of the water in described Venturi Scrubber is lower 10 DEG C than the temperature of described first process gas ~ and 200 DEG C, the consumption of the water in described Venturi Scrubber is: the first process gas of every cubic metre uses the water of 0.001 ~ 10L; The temperature of the water in described foam scrubber is lower than the temperature of described reprocessing gas 0 DEG C ~ and 200 DEG C.
The stage purification method of dusty gas of the present invention, the parameter for each equipment is carried out preferably, and the equipment that the method uses and these parameter overall coordinations, achieve the effect good as above of the purification to dusty gas.
Spray column is a kind of common wet cleaning equipment, and generally speaking, the trapping mechanism of wet cleaning equipment mainly relies on inertial collision between drop and grit and interception function, and it is mainly used in removing the particle being greater than 1 μm.And the present invention, preferred and adjustment has been carried out to each parameter of the washing process of spray column, under each Parameter Conditions that the present invention limits, the washing process in spray column is not only the process of wet scrubbing, but the process of synchronously carrying out is washed in wet scrubbing and steam phase transforming condensation.The process of this condensation washing, coordinate whole equipment of the present invention, and the Parameter Conditions limited in each equipment, stage purification technique of the present invention is arranged to the technique of washing, purifying step by step that one " rough segmentation " and " fine purifiation " combines, wherein, rough segmentation refers to the washing process in spray column, Venturi Scrubber and the gas-liquid separation process in separator, and fine purifiation refers to the washing process of foam scrubber; Washing, purifying technique can the position that occurs of directed regulation and control steam phase transforming condensation dedusting and degree step by step for this, realizes the efficient removal being less than 1 μm of ultra-fine ash particle, thus realizes and the deep purifying of high dusty gas that thin grey hydrophobicity strong great containing ultra-fine gray scale.
Below for the preferred further scope of each equipment of the present invention or technological parameter, do following explanation:
In the present invention, described pending gas is dusty gas.Described dusty gas is the dusty gas of this area routine, is preferably with one or more in coal, petroleum coke, living beings and flammable solid discarded object for raw material, the synthesis gas of production or combustion gas.
In the present invention, described pending gas comprises the particle of steam and different-grain diameter; The average grain diameter of wherein said particle is 40 μm, and the wet basis content of described particle is preferably 10 ~ 200g/m
3gas is more preferably 40 ~ 150g/m
3gas; And in described particle, the wet basis content that particle diameter is less than the particle of 1 μm is 0.01 ~ 60g/m
3gas; Described wet basis content refers to: with the volume of the pending gas of steam; The content of described steam is 50%-70%, and described percentage is the percent by volume accounting for pending gas.
The temperature of described pending gas is preferably 0 DEG C ~ 300 DEG C, is more preferably 200 ~ 250 DEG C; The pressure of described pending gas is preferably 0.1 ~ 9.0MPa, and be more preferably 3.0 ~ 6.5Mpa, described pressure is relative pressure.Those skilled in the art all understand: relative pressure is a kind of using atmospheric pressure as the pressure represented by benchmark; Relative pressure=absolute pressure-atmospheric pressure.
In the present invention, the temperature difference of the water in described spray column and described pending gas, determines the degree of the condensation of pending gas in described spray column, this temperature differences effect cleaning dust effect.The temperature of the water in described spray column preferably lower than the temperature of described pending gas 50 DEG C ~ 90 DEG C.
In the present invention, the consumption of the water in described spray column is preferably: the pending gas of every cubic metre uses the water of 1 ~ 8L.
In the present invention, the temperature of the water in described Venturi Scrubber preferably lower 50 DEG C than the temperature of described first process gas ~ 90 DEG C.
In the present invention, the consumption of the water in described Venturi Scrubber is: the first process gas of every cubic metre uses the water of 1 ~ 8L.
The temperature of the water in described foam scrubber preferably lower than the temperature of described reprocessing gas 50 DEG C ~ 90 DEG C.
In the present invention, the consumption of the water in described foam scrubber is: the reprocessing gas of every cubic metre uses the water of 15-50L.
In the present invention, from described Venturi Scrubber, effluent air is the speed of this area routine in the inlet velocity of the second gas feed of described separator, is preferably 15m/s ~ 25m/s.
In the present invention, the water in described spray column, described Venturi Scrubber and described foam scrubber can be purified waste water for technique, one or more in process condensate water and outer water supply.
In the present invention, the technique of the stage purification method of described dusty gas is preferably as described below:
(1) pending gas passes into described spray column, in the spray space in described spray column, with water counter current contacting, described pending gas is lowered the temperature, dehumidification and purification, thin ash particle wherein, under the effect of the water of specific temperature and consumption, coalescence increases, and meanwhile, water is warmed;
(2), after washing, obtain at the first gas outlet of described spray column and just process gas, described first process gas is dust-laden saturated gas; Described first process gas enters described Venturi Scrubber by pipeline; In described Venturi Scrubber, again contact with water and mix, under the effect of the water of specific temperature and consumption, described first process gas is lowered the temperature further, form gas-liquid-solid mixture, the further coalescence of thin ash particle wherein and be spontaneously wet out by water, contain and increase;
(3) gas-liquid-solid mixture described in enters described separator by pipeline, under the influence of centrifugal force, realizes being separated of gas and liquid-solid body, purifies further, obtain reprocessing gas; Described reprocessing gas is dust-laden saturated gas;
(4) the reprocessing gas described in enters foam scrubber by pipeline, washing; Described washing is: described reprocessing gas and washings reverse flow, and is contacted by bubbling on tower tray.
In above-mentioned technique, preferably, discharge containing grey waste water in the 3rd wastewater outlet of the first wastewater outlet of described spray column, the second wastewater outlet of described separator and described foam scrubber.Described imports containing grey water treatment system containing grey waste line.Contain in grey water treatment system described, step-down flash distillation, is further concentrated containing the solid particle in grey waste water, is constantly clarified containing the waste water in grey waste water, and heat is recovered simultaneously.After clarification cooling, buck can turn back in technique of the present invention, to purify waste water use as technique.
In above-mentioned technique, preferably, the liquid in reservoir is extracted by water circulating pump, enters circulating line, enters into the shock chamber being entered gasification furnace by chilling ring afterwards.The high-temperature gas that this recirculated water is mainly used in going out gasification furnace carries out Quench, also has the effect of primary wash gas simultaneously.
On the basis meeting this area general knowledge, above-mentioned each optimum condition, can be combined, obtain the preferred embodiments of the invention.
Agents useful for same of the present invention and raw material are all commercially.
Positive progressive effect of the present invention is:
(1) characteristic distributions of thin ash in the stage purification methods combining dusty gas of dusty gas of the present invention, adopt the washing and purifying method step by step that " rough segmentation " and " fine purifiation " combines, while reduction equipment for washing purification load, effectively improve detersive efficiency;
(2) the stage purification method of dusty gas of the present invention substantially increases in dusty gas the removal efficiency being less than 1 μm of ultra-fine grain, and removal efficiency reaches more than 95%, and the content processing the thin ash in the clean synthesis gas obtained is 1mg/Nm
3below, the deep purifying containing ultra-fine ash (<1 μm) the high dusty gas stronger than great and thin grey hydrophobicity is achieved;
(3) the stage purification method of dusty gas of the present invention can not cause the blocking of foam scrubber, and technique is simple and convenient, can meet different industrial needs, more facilitates the stable, reliable of commercial plant and long-term operation.
Accompanying drawing explanation
Fig. 1 is the structure chart of the stage purification equipment of the dusty gas of embodiment 1-3.
Fig. 2 is the sectional view of the Venturi Scrubber 2 in Fig. 1.
Fig. 3 is the enlarged drawing in the A portion of the Venturi Scrubber 2 shown in Fig. 2.
Detailed description of the invention
Mode below by embodiment further illustrates the present invention, but does not therefore limit the present invention among described scope of embodiments.The experimental technique of unreceipted actual conditions in the following example, conventionally and condition, or selects according to catalogue.
Embodiment 1
A stage purification equipment for dusty gas, as shown in Figure 1: this stage purification equipment comprises spray column 1, Venturi Scrubber 2, separator 3, foam scrubber 4 and the water circulating pump 5 connected successively;
(1) spray column:
This spray column 1 can be independent spray column, also can also be the spray column with other device coupled of upstream process;
This spray column 1 comprises spray column tower body 10, spraying layer 13, first liquid import 11,1 first gas feed 12,1 first gas vent 14 and one first wastewater outlet 15; This spraying layer 13 is positioned at the top of this spray column 1, and is connected with this first liquid import 11; This first gas feed 12 and this first liquid import 11 are all positioned at the side of this spray column tower body 10, and this first gas feed 12 is positioned at the below of this first liquid import 11; This first gas vent 14 is positioned at the top of this spray column tower body 10; This first wastewater outlet 15 is positioned at the bottom of this spray column tower body 10;
(2) Venturi Scrubber (Venturi scrubber):
This Venturi Scrubber 2 comprises a washing portion 20, the grey water pipe 22 of syngas tube 21, and an escape pipe 25; This syngas tube 21 is positioned at a side in this washing portion 20; This escape pipe 25 is positioned at another side in this washing portion 20; This grey water pipe 22 is positioned at the top in this washing portion 20;
The sectional view of this Venturi Scrubber 2 as shown in Figure 2, in Fig. 2, the enlarged drawing in A portion as shown in Figure 3, composition graphs 2 and Fig. 3: water jet and this syngas tube 21 of this grey water pipe 22 are interconnected, a sleeve pipe 24 is provided with in this syngas tube 21, the water jet of this grey water pipe 22 is relative with the air inlet of this sleeve pipe 24, and this water jet place of the neighbour of this grey water pipe 22 is provided with a cyclone 23; This sleeve pipe 24 comprises 241, one, the convergent portion larynx neck 242 and a flaring portion 243 that are connected successively along airflow direction, the bore in this convergent portion 241 reduces gradually along airflow direction, this larynx neck 242 is hollow cylindrical, and the bore in this flaring portion 243 increases gradually along airflow direction;
The diameter of this syngas tube 21 is D, and the diameter D of this syngas tube 21 is 300-800mm; The water jet of this grey water pipe 22 is 0.15D apart from the length H1 of this larynx neck 242; The length H2 of this larynx neck 242 is 0.15D; This cyclone 23 is 0.15D apart from the distance H3 of the water jet of this grey water pipe 22; The diameter D1 of this larynx neck 242 is 0.3D; The length H4 in this flaring portion 243 is 2.5D; The angle of throat α in this convergent portion 241 is 37 °, and the extended corner β in this flaring portion 243 is 10 °;
(3) cyclone separator:
This cyclone separator 3 comprises separation unit 30,1 second gas feed 31,1 second gas vent 32 and one second wastewater outlet 33; This second gas feed 31 is positioned at the side of this separation unit 30; This second gas vent 32 is positioned at the top of this separation unit 30; This second wastewater outlet 33 is positioned at the bottom of this separation unit 30;
(4) foam scrubber:
In this embodiment, this foam scrubber is the foam scrubber in embodiment 1 disclosed in Chinese patent CN203128516U; Specifically, this foam scrubber 4 comprises scrubbing tower 40, the 3rd gas feed 41, the 3rd gas vent 42, the 3rd liquid-inlet 43, the 3rd wastewater outlet 44 and a reservoir 45; 3rd gas feed 41 is positioned at the side of this scrubbing tower 40; 3rd liquid-inlet 73 is positioned at another side of this scrubbing tower 40; 3rd gas vent 42 is positioned at the top of this scrubbing tower 40; This reservoir 45 is positioned at the bottom of this scrubbing tower 40, and the 3rd wastewater outlet 44 is positioned at the bottom of this scrubbing tower 40, and is connected with this reservoir 45;
In this scrubbing tower 40, layer communicates with each other every being provided with successively from top to bottom: one for removing the demister that drop is carried secretly, first paragraph column plate layer and the spraying layer slightly washed for gas-liquid contact carrying out fine purifiation for realizing gas-liquid contact; The upright position of the 3rd gas feed 41 is between this spraying layer and this reservoir 45; The upright position of the 3rd liquid-inlet 43 is between this demister and this first column plate layer;
Specifically see the embodiment 1 in Chinese patent CN203128516U and accompanying drawing 1;
(5) the first gas vent 14 of this spray column 1 is connected with the import of the syngas tube 21 of this Venturi Scrubber 2, the escape pipe 25 of this Venturi Scrubber 2 is connected with the second gas feed 31 of this separator 3, and the second gas vent 32 of this separator 3 is connected with the 3rd gas feed 41 of this foam scrubber 4 by pipeline; This water circulating pump 5 is connected with the reservoir of this foam scrubber 4; Connection between each equipment is and is connected by pipeline.
Embodiment 2
A stage purification equipment for dusty gas, as shown in Figure 1: this stage purification equipment comprises spray column 1, Venturi Scrubber 2, separator 3, foam scrubber 4 and the water circulating pump 5 connected successively;
(1) spray column:
This spray column 1 can be independent spray column, also can also be the spray column with other device coupled of upstream process;
This spray column 1 comprises spray column tower body 10, spraying layer 13, first liquid import 11,1 first gas feed 12,1 first gas vent 14 and one first wastewater outlet 15; This spraying layer 13 is positioned at the top of this spray column 1, and is connected with this first liquid import 11; This first gas feed 12 and this first liquid import 11 are all positioned at the side of this spray column tower body 10, and this first gas feed 12 is positioned at the below of this first liquid import 11; This first gas vent 14 is positioned at the top of this spray column tower body 10; This first wastewater outlet 15 is positioned at the bottom of this spray column tower body 10;
(2) Venturi Scrubber (Venturi scrubber):
This Venturi Scrubber 2 comprises a washing portion 20, the grey water pipe 22 of syngas tube 21, and an escape pipe 25; This syngas tube 21 is positioned at a side in this washing portion 20; This escape pipe 25 is positioned at another side in this washing portion 20; This grey water pipe 22 is positioned at the top in this washing portion 20;
The sectional view of this Venturi Scrubber 2 as shown in Figure 2, in Fig. 2, the enlarged drawing in A portion as shown in Figure 3, composition graphs 2 and Fig. 3: water jet and this syngas tube 21 of this grey water pipe 22 are interconnected, a sleeve pipe 24 is provided with in this syngas tube 21, the water jet of this grey water pipe 22 is relative with the air inlet of this sleeve pipe 24, and this water jet place of the neighbour of this grey water pipe 22 is provided with a cyclone 23; This sleeve pipe 24 comprises 241, one, the convergent portion larynx neck 242 and a flaring portion 243 that are connected successively along airflow direction, the bore in this convergent portion 241 reduces gradually along airflow direction, this larynx neck 242 is hollow cylindrical, and the bore in this flaring portion 243 increases gradually along airflow direction;
The diameter of this syngas tube 21 is D, and the diameter D of this syngas tube 21 is 300-800mm; The water jet of this grey water pipe 22 is 0.15D apart from the length H1 of this larynx neck 242; The length H2 of this larynx neck 242 is 0.15D; This cyclone 23 is 0.15D apart from the distance H3 of the water jet of this grey water pipe 22; The diameter D1 of this larynx neck 242 is 0.3D; The length H4 in this flaring portion 243 is 2.5D; The angle of throat α in this convergent portion 241 is 37 °, and the extended corner β in this flaring portion 243 is 10 °;
(3) cyclone separator:
This cyclone separator 3 comprises separation unit 30,1 second gas feed 31,1 second gas vent 32 and one second wastewater outlet 33; This second gas feed 31 is positioned at the side of this separation unit 30; This second gas vent 32 is positioned at the top of this separation unit 30; This second wastewater outlet 33 is positioned at the bottom of this separation unit 30;
(4) foam scrubber:
In this embodiment, this foam scrubber is the foam scrubber in embodiment 2 disclosed in Chinese patent CN203128516U; Specifically, this foam scrubber 4 comprises scrubbing tower 40, the 3rd gas feed 41, the 3rd gas vent 42, the 3rd liquid-inlet 43, the 3rd wastewater outlet 44 and a reservoir 45; 3rd gas feed 41 is positioned at the side of this scrubbing tower 40; 3rd liquid-inlet 73 is positioned at another side of this scrubbing tower 40; 3rd gas vent 42 is positioned at the top of this scrubbing tower 40; This reservoir 45 is positioned at the bottom of this scrubbing tower 40, and the 3rd wastewater outlet 44 is positioned at the bottom of this scrubbing tower 40, and is connected with this reservoir 45;
In this scrubbing tower in 40 from top to bottom successively layer communicate with each other every being provided with: one for removing the demister that drop is carried secretly, the one first paragraph column plate layer carrying out fine purifiation for realizing gas-liquid contact, one for the second segment column plate layer of secondary fine purifiation and a spraying layer slightly washed for gas-liquid contact; The upright position of the 3rd gas feed 41 is between this spraying layer and this reservoir 45; The upright position of the 3rd liquid-inlet 43 is between this demister and this first column plate layer; This first paragraph column plate layer, second segment column plate layer and spraying layer communicate; Specifically see the embodiment 2 in Chinese patent CN203128516U and accompanying drawing 2;
(5) the first gas vent 14 of this spray column 1 is connected with the import of the syngas tube 21 of this Venturi Scrubber 2, the escape pipe 25 of this Venturi Scrubber 2 is connected with the second gas feed 31 of this separator 3, and the second gas vent 32 of this separator 3 is connected with the 3rd gas feed 41 of this foam scrubber 4 by pipeline; This water circulating pump 5 is connected with the reservoir of this foam scrubber 4;
Connection between above-mentioned each equipment is and is connected by pipeline.
Embodiment 3
A stage purification equipment for dusty gas, as shown in Figure 1: this equipment comprises spray column 1, Venturi Scrubber 2, separator 3, foam scrubber 4 and the water circulating pump 5 connected successively;
(1) spray column:
This spray column 1 can be independent spray column, also can also be the spray column with other device coupled of upstream process;
This spray column 1 comprises spray column tower body 10, spraying layer 13, first liquid import 11,1 first gas feed 12,1 first gas vent 14 and one first wastewater outlet 15; This spraying layer 13 is positioned at the top of this spray column 1, and is connected with this first liquid import 11; This first gas feed 12 and this first liquid import 11 are all positioned at the side of this spray column tower body 10, and this first gas feed 12 is positioned at the below of this first liquid import 11; This first gas vent 14 is positioned at the top of this spray column tower body 10; This first wastewater outlet 15 is positioned at the bottom of this spray column tower body 10;
(2) Venturi Scrubber (Venturi scrubber):
This Venturi Scrubber 2 comprises a washing portion 20, the grey water pipe 22 of syngas tube 21, and an escape pipe 25; This syngas tube 21 is positioned at a side in this washing portion 20; This escape pipe 25 is positioned at another side in this washing portion 20; This grey water pipe 22 is positioned at the top in this washing portion 20;
(3) cyclone separator:
This cyclone separator 3 comprises separation unit 30,1 second gas feed 31,1 second gas vent 32 and one second wastewater outlet 33; This second gas feed 31 is positioned at the side of this separation unit 30; This second gas vent 32 is positioned at the top of this separation unit 30; This second wastewater outlet 33 is positioned at the bottom of this separation unit 30;
(4) foam scrubber:
This foam scrubber 4 comprises scrubbing tower 40, the 3rd gas feed 41, the 3rd gas vent 42, the 3rd liquid-inlet 43, the 3rd wastewater outlet 44 and a reservoir 45; 3rd gas feed 41 is positioned at the side of this scrubbing tower 40; 3rd liquid-inlet 73 is positioned at another side of this scrubbing tower 40; 3rd gas vent 42 is positioned at the top of this scrubbing tower 40; This reservoir 45 is positioned at the bottom of this scrubbing tower 40, and the 3rd wastewater outlet 44 is positioned at the bottom of this scrubbing tower 40, and is connected with this reservoir 45;
(5) the first gas vent 14 of this spray column 1 is connected with the import of the syngas tube 21 of this Venturi Scrubber 2, the escape pipe 25 of this Venturi Scrubber 2 is connected with the second gas feed 31 of this separator 3, and the second gas vent 32 of this separator 3 is connected with the 3rd gas feed 41 of this foam scrubber 4 by pipeline; This water circulating pump 5 is connected with the reservoir of this foam scrubber 4;
Connection between above-mentioned each equipment is and is connected by pipeline.
Embodiment 4
Dusty gas wet classification process for purifying, use equipment as described in Example 3, this technique comprises the following steps:
(1) the saturated dusty gas of upstream process is by the first gas feed 12, enter the spray column tower body 10 of spray column 1, the washings lower than dusty gas temperature are fed spraying layer 13 by first liquid import 11, washings and dusty gas counter current contacting in spray column tower body 10, dusty gas is lowered the temperature, dehumidification, purification, discharge from the first gas vent 14 after foam removal, washings are warmed and become containing grey waste water because having trapped thin ash particle, discharge from the first wastewater outlet 15, obtain and just process gas; This first process gas is saturated dusty gas;
(2) from the first process gas that the first gas vent 14 of spray column 1 is discharged, pass through pipeline, pass into the syngas tube 21 of Venturi Scrubber 2, and enter in the washing portion 20 of Venturi Scrubber 2, first process gas is accelerated, the washings lower than just process gas temperature are by the grey water pipe 22 from Venturi Scrubber 2, feed in the washing portion 20 of Venturi Scrubber 2, washings are atomized, the first process gas accelerated again contacts with the washings be atomized and is mixed to form gas-liquid-solid mixture, just process gas is lowered the temperature further in the process, the further coalescence of thin ash particle wherein and being soaked by washings, contain and increase, in Venturi Scrubber 2, obtain the gas-liquid-solid mixture mixed, this gas-liquid-solid mixture is got rid of from escape pipe 25,
(3) above-mentioned gas-liquid-solid mixture passes through pipeline, by the second gas feed 31 of cyclone separator 3, and enter in the separation unit 30 of cyclone separator 3, under the influence of centrifugal force, complete being separated of gas and liquid-solid body, dusty gas after being cleaned is discharged from the second gas vent 32 of cyclone separator 3, obtains reprocessing gas; Should at process gas for containing grey saturated gas; Discharging from the second wastewater outlet 33 containing grey waste water after separation;
(4) the reprocessing gas of discharging from the second gas vent 32 of cyclone separator 3 passes through pipeline, by the 3rd gas feed 41 of foam scrubber 4, enter the bottom of the scrubbing tower 40 of foam scrubber 4, washings, from the 3rd liquid-inlet 43 on the top of the scrubbing tower 40 of foam scrubber 4, add tower tray.In the scrubbing tower 40 of foam scrubber 4, reprocessing gas and washings reverse flow, and contacted " fine purifiation " by bubbling on tower tray, clean air after " fine purifiation " is discharged from the 3rd gas vent 42, through pipeline, enter lower procedure, what washing produced enters reservoir 45 containing grey waste water, discharges from the 3rd wastewater outlet 44 through gravitational settling rear section;
Water circulating pump 5 is connected by pipeline with the reservoir 45 of foam scrubber 4, and the part buck after gravitational settling in reservoir 45 is extracted by water circulating pump 5, as systemic circulation water.
From the second wastewater outlet 33 of the first wastewater outlet 15 of spray column 1, cyclone separator 3 and the 3rd wastewater outlet 44 of foam scrubber 4 discharge containing grey waste water, respectively through pipeline, import and be further processed containing grey water treatment system.
Embodiment 5
Process the powdered coal pressuring gasified device of Quench type of 1000 tons of coals one day, coal ash is divided into 27%, and vapor pressure is 4.0MPa, and gasification temperature is 1550 DEG C, and go out the high-temperature gas of vaporizer after water Quench, temperature is 221 DEG C, and relative pressure is 3.98MPa, and flow is 8673m
3/ h, in gas, thin ash content is 72g/m
3, as pending gas.
Use equipment as described in Example 3, this technique comprises the following steps:
Spray column 1 and Venturi Scrubber 2 all adopt technique to purify waste water as washings, and foam scrubber 4 adopts process condensate water and technique to purify waste water as washings;
Stage purification method comprises the following steps:
(1) by first gas feed 12 of pending gas (dusty gas) by spray column 1, pass in the spray column tower body 10 of spray column 1, simultaneously, washings are passed in spraying layer 13 by the first liquid import 11 of spray column 1, washings and pending gas (dusty gas) counter current contacting in the spray column tower body 10 of spray column 1, pending gas is lowered the temperature, dehumidification, purification, foam removal, obtain at the first gas vent 14 place of spray column 1 and just process gas; Washings are warmed and become containing grey waste water because having trapped thin ash particle, discharge from the first wastewater outlet 15;
Wherein, the amount of the washings in spray column 1 is 50m
3/ h, water and the liquid gas volume ratio 5.77L/m of dusty gas entering spray column 1
3, the temperature of water is lower than the temperature of pending gas 74 DEG C;
(2) gas is just processed through pipeline, pass into the syngas tube 21 of Venturi Scrubber 2, enter in the washing portion 20 of Venturi Scrubber 2, washings are fed in Venturi Scrubber 2 by the grey water pipe 22 from washer 2, just the process further coalescence of gas and wetting by washings, contain and increase; In Venturi Scrubber 2, obtain the gas-liquid-solid mixture mixed, this gas-liquid-solid mixture is discharged from escape pipe 25;
Wherein, the amount of the washings in Venturi Scrubber 2 is 40m
3/ h, with the liquid gas volume ratio 5.03L/m just processing gas
3, the temperature of the water in Venturi Scrubber 2 is lower 71 DEG C than the temperature just processing gas;
(3) this gas-liquid-solid mixture is through pipeline, through the second gas feed 31 of cyclone separator 3, enters in the separation unit 30 of cyclone separator 3, is separated under the influence of centrifugal force, at the second gas vent 32 place of cyclone separator 3, obtains reprocessing gas; Discharging from the second wastewater outlet 33 containing grey waste water after separation;
(4) this reprocessing gas, pass through pipeline, by the 3rd gas feed 41 of foam scrubber 4, enter in the scrubbing tower 40 of foam scrubber 4, washings enter in the scrubbing tower 40 of foam scrubber 4 from the 3rd liquid-inlet 43, and wherein, process condensate water adds from the import in the top portion of the 3rd liquid-inlet 43 of foam scrubber 4, the import that technique is purified waste water is more lower slightly than the entrance location of process condensate water, adds from the import in the portion on the lower of the 3rd liquid-inlet 43 of foam scrubber 4; Washing, obtains clean synthesis gas, gets rid of from the 3rd gas vent 42; What washing produced enters reservoir 45 containing grey waste water, discharges from the 3rd wastewater outlet 44 through gravitational settling rear section;
Wherein, the amount of the process condensate water of foam scrubber 4 is 69m
3/ h, the technique purification water yield is 168m
3/ h, the temperature of process condensate water is lower than the temperature of reprocessing gas 66 DEG C, and the temperature of the technique purification water yield is lower than the temperature of reprocessing gas 68 DEG C;
(5) from the second wastewater outlet 33 of the first wastewater outlet 15 of spray column 1, cyclone separator 3 and the 3rd wastewater outlet 44 of foam scrubber 4 discharge containing grey waste water, respectively through pipeline, import and be further processed containing grey water treatment system; Should import containing grey water treatment system containing grey waste line; At this containing in grey water treatment system, step-down flash distillation, is further concentrated containing the solid particle in grey waste water, is constantly clarified containing the waste water in grey waste water, and heat is recovered simultaneously.After clarification cooling, buck can turn back in technique of the present invention, to purify waste water use as technique;
Water circulating pump 5 is connected by pipeline with the reservoir 45 of foam scrubber 4, the part buck after gravitational settling in reservoir 45 is extracted by water circulating pump 5, enter circulating line, enter into the shock chamber being entered gasification furnace by chilling ring afterwards, the high-temperature gas that this recirculated water may be used for going out gasification furnace carries out Quench, also has the effect of primary wash gas simultaneously.
Result: be 72g/m containing thin ash quantity
3high dusty gas after this wet classification washing, purifying, from the clean synthesis gas that foam scrubber 4 is discharged, thin ash content is 0.8mg/Nm
3, the removal efficiency being less than 1 μm of ultra-fine grain in this dusty gas up to more than 98%, can meet the requirement of lower procedure very well, and foam scrubber 4 can not block.
Embodiment 6
The temperature of the temperature gas more pending than this of the water in spray column is low 10 DEG C, and all the other are with the embodiment of the present invention 5.
Result: in clean synthesis gas, thin ash content is 0.88mg/Nm
3, be less than the removal efficiency 97.5% of 1 μm of ultra-fine grain in dusty gas, and foam scrubber does not block.
Embodiment 7
The consumption of the water in spray column is: the pending gas of every cubic metre uses the water of 0.5L, and all the other are with the embodiment of the present invention 5.
Result: in clean synthesis gas, thin ash content is 0.85mg/Nm
3, be less than the removal efficiency 98.0% of 1 μm of ultra-fine grain in dusty gas, and foam scrubber does not block.
Embodiment 8
The temperature of the temperature process gas more first than this of the water in Venturi Scrubber is low 30 DEG C, and all the other are with the embodiment of the present invention 5.
Result: in clean synthesis gas, thin ash content is 0.93mg/Nm
3, in dusty gas, be less than the removal efficiency 96.8% of 1 μm of ultra-fine grain.
Embodiment 9
The consumption of the water in Venturi Scrubber is: the first process gas of every cubic metre uses the water of 0.6L, and all the other are with the embodiment of the present invention 5.
Result: in clean synthesis gas, thin ash content is 0.90mg/Nm
3, in dusty gas, be less than the removal efficiency 97.0% of 1 μm of ultra-fine grain.
Embodiment 10
Technological parameter and condition, with embodiment 5, adopt the equipment described in embodiment 2.Result: in clean synthesis gas, thin ash content is 0.78mg/Nm
3, be less than the removal efficiency 98.2% of 1 μm of ultra-fine grain in dusty gas, and foam scrubber does not block.
Embodiment 11
Technological parameter and condition, with embodiment 5, adopt the equipment described in embodiment 1.Result: in clean synthesis gas, thin ash content is 0.79mg/Nm
3, be less than the removal efficiency 98.1% of 1 μm of ultra-fine grain in dusty gas, and foam scrubber does not block.
Comparative example 1
Process the powdered coal pressuring gasified device of Quench type of 1000 tons of coals one day, coal ash is divided into 27%, and vapor pressure is 4.0MPa, and gasification temperature is 1550 DEG C, and go out the high-temperature gas of vaporizer after water Quench, temperature is 221 DEG C, and pressure is 3.98MPa, and flow is 8673m
3/ h, in gas, thin ash content is 72g/m
3.Traditional " Venturi Scrubber+cyclone separator+foam scrubber " technique is adopted to carry out washing, purifying to this dusty gas, Venturi Scrubber adopts process recycled water as washings, and foam scrubber adopts process condensate water and technique to purify waste water as washings.Add the washing water yield 40m of Venturi Scrubber
3/ h, with the liquid gas volume ratio 5.03L/m of dusty gas entering Venturi Scrubber
3, temperature difference is 0.5 DEG C;
The process condensate water yield adding foam scrubber is 69m
3/ h, the technique purification water yield is 168m
3/ h, both are respectively 66 DEG C and 74 DEG C with the temperature difference of the dusty gas entering foam scrubber.
Be 72g/m containing thin ash quantity
3high dusty gas after traditional " Venturi Scrubber+cyclone separator+foam scrubber " technique washing, purifying, from the clean synthesis gas that foam scrubber is discharged, thin ash content is 150mg/Nm
3, be less than the removal efficiency of 1 μm of ultra-fine grain in dusty gas less than 60%, and foam scrubber very easily blocks, has a strong impact on the long-period stable operation of whole system.
Comparative example 2
The temperature of the temperature gas more pending than this of the water in spray column is low 5 DEG C, and all the other are with the embodiment of the present invention 5.
Result: in clean synthesis gas, thin ash content is 100mg/Nm
3, be less than the removal efficiency 70% of 1 μm of ultra-fine grain in dusty gas, and blocking appears in foam scrubber.
Comparative example 3
The temperature of the temperature process gas more first than this of the water in Venturi Scrubber is low 5 DEG C, and all the other are with the embodiment of the present invention 5.
Result: in clean synthesis gas, thin ash content is 115mg/Nm
3, be less than the removal efficiency 75% of 1 μm of ultra-fine grain in dusty gas, and blocking appears in foam scrubber.
Claims (10)
1. a stage purification equipment for dusty gas, is characterized in that: described stage purification equipment comprises the spray column, a Venturi Scrubber, a separator and the foam scrubber that connect successively.
2. stage purification equipment as claimed in claim 1, is characterized in that: described Venturi Scrubber comprises a washing portion, a syngas tube, a grey water pipe and an escape pipe;
Preferably, described syngas tube is connected with described spray column, and described escape pipe is connected with described separator;
Preferably, described syngas tube is positioned at a side in described washing portion; Described escape pipe is positioned at another side in described washing portion; Described grey water pipe is positioned at the top in described washing portion; Water jet and the described syngas tube of described grey water pipe are interconnected, a sleeve pipe is provided with in described syngas tube, the water jet of described grey water pipe is relative with the air inlet of described sleeve pipe, and the water jet place described in neighbour of described grey water pipe is provided with a cyclone; Described sleeve pipe comprises the convergent portion be connected successively, a larynx neck and a flaring portion along airflow direction, the bore in described convergent portion reduces gradually along airflow direction, described larynx neck is hollow cylindrical, and the bore in described flaring portion increases gradually along airflow direction;
More preferably, the diameter of described syngas tube is D, and the diameter D of described syngas tube is 300-800mm; The water jet of described grey water pipe is more preferably 0.1D ~ 0.2D apart from the length H1 of described larynx neck, is more preferably 0.15D further; The length H2 of described larynx neck is more preferably 0.1D ~ 0.2D, is more preferably 0.15D further; Described cyclone is more preferably 0.1D ~ 0.2D apart from the distance H3 of the water jet of described grey water pipe, is more preferably 0.15D further; The length H4 in described flaring portion is more preferably 0.5D ~ 4.2D, is more preferably 2.5D further; The diameter D1 of described larynx neck is more preferably 0.2D ~ 0.5D, is more preferably 0.3D further; The angle of throat α in described convergent portion is more preferably 20 °-60 °, is more preferably 37 ° further; The extended corner β in described flaring portion is more preferably 5 °-30 °, is more preferably 10 ° further.
3. stage purification equipment as claimed in claim 1 or 2, is characterized in that:
Described spray column is independent spray column, or with the spray column of upstream process device coupled; Described spray column comprises a spray column tower body, a spraying layer, a first liquid import, one first gas feed, one first gas vent and one first wastewater outlet; Preferably, described spraying layer is positioned at the top of described spray column tower body, and is connected with described first liquid import; Preferably, the first described gas feed and described first liquid import are all positioned at the side of described spray column tower body, and the first described gas feed is positioned at the below of described first liquid import; Preferably, the first described gas vent is positioned at the top of described spray column tower body; Preferably, the first described wastewater outlet is positioned at the bottom of described spray column tower body; The first described gas vent is connected with described Venturi Scrubber;
Described separator comprises a separation unit, one second gas feed, one second gas vent and one second wastewater outlet; Preferably, the second described gas feed is positioned at the side of described separation unit; Preferably, the second described gas vent is positioned at the top of described separation unit; Preferably, the second described wastewater outlet is positioned at the bottom of described separation unit; Described separator is more preferably cyclone separator; The second described gas vent is connected with described Venturi Scrubber; The second described gas vent is connected with described foam scrubber;
Described foam scrubber comprises a scrubbing tower, one the 3rd gas feed, one the 3rd gas vent, one the 3rd liquid-inlet, one the 3rd wastewater outlet and a reservoir; Preferably, the 3rd described gas feed is positioned at the side of described scrubbing tower; Preferably, the 3rd described liquid-inlet is positioned at the side of described scrubbing tower; More preferably, the 3rd described gas feed and the 3rd described gas vent lay respectively at the both sides of the opposition of described scrubbing tower; Preferably, the 3rd described gas vent is positioned at the top of described scrubbing tower; Preferably, described reservoir is positioned at the bottom of described scrubbing tower; Preferably, the 3rd described wastewater outlet is positioned at the bottom of described scrubbing tower, and is connected with described reservoir; The 3rd described gas feed is connected with described separator.
4. stage purification equipment as claimed in claim 3, it is characterized in that: in described scrubbing tower, layer communicates with each other every being provided with successively from top to bottom: one for removing the demister that drop is carried secretly, first paragraph column plate layer and the spraying layer slightly washed for gas-liquid contact carrying out fine purifiation for realizing gas-liquid contact; The upright position of the 3rd described gas feed is between described spraying layer and described reservoir; The upright position of the 3rd described liquid-inlet is between described demister and the first described column plate layer;
Or, in described scrubbing tower, layer communicates with each other every being provided with successively from top to bottom: one for removing the demister that drop is carried secretly, the one first paragraph column plate layer carrying out fine purifiation for realizing gas-liquid contact, one for the second segment column plate layer of secondary fine purifiation and a spraying layer slightly washed for gas-liquid contact; The upright position of the 3rd described gas feed is between described spraying layer and described reservoir; The upright position of the 3rd described liquid-inlet is between described demister and the first described column plate layer; Described first paragraph column plate layer, second segment column plate layer and spraying layer communicate.
5. stage purification equipment as claimed in claim 4, is characterized in that: described stage purification equipment also comprises a water circulating pump; Described water circulating pump is connected with the reservoir of described foam scrubber.
6. a stage purification method for dusty gas, is characterized in that: described stage purification method uses the stage purification equipment of the dusty gas according to any one of claim 1-5; Described stage purification method comprises the following steps: passed into by pending gas in described spray column, after washing, obtain at the first gas outlet of described spray column and just process gas, described first process gas washs through described Venturi Scrubber, be separated through described separator again, obtain reprocessing gas, described reprocessing gas enters foam scrubber washing;
Wherein, the temperature of the water in described spray column is lower than the temperature of described pending gas 10 DEG C ~ and 200 DEG C, the consumption of the water in described spray column is: the pending gas of every cubic metre uses the water of 0.001 ~ 10L; The temperature of the water in described Venturi Scrubber is lower 10 DEG C than the temperature of described first process gas ~ and 200 DEG C, the consumption of the water in described Venturi Scrubber is: the first process gas of every cubic metre uses the water of 0.001 ~ 10L; The temperature of the water in described foam scrubber is lower than the temperature of described reprocessing gas 0 DEG C ~ and 200 DEG C.
7. stage purification method as claimed in claim 6, it is characterized in that: described pending gas is dusty gas, is preferably with one or more in coal, petroleum coke, living beings and flammable solid discarded object for raw material, the synthesis gas of production or combustion gas;
Described pending gas comprises steam and particle; The average grain diameter of wherein said particle is 40 μm, and the wet basis content of described particle is 10 ~ 200g/m
3gas is preferably 40 ~ 150g/m
3gas; And in described particle, the wet basis content that particle diameter is less than the particle of 1 μm is 0.01 ~ 60g/m
3gas; The content of described steam is 50%-70%, and described percentage is the percent by volume accounting for pending gas.
8. stage purification method as claimed in claim 7, is characterized in that: the temperature of described pending gas is 0 DEG C ~ 300 DEG C, is preferably 200 ~ 250 DEG C; The pressure of described pending gas is 0.1 ~ 9.0MPa, is preferably 3.0 ~ 6.5Mpa, and described pressure is relative pressure.
9. stage purification method as claimed in claim 6, is characterized in that: the temperature of the water in described spray column is lower than the temperature of described pending gas 50 DEG C ~ and 90 DEG C; The consumption of the water in described spray column is: the pending gas of every cubic metre uses the water of 1 ~ 8L; The temperature of the water in described Venturi Scrubber is lower 50 DEG C than the temperature of described first process gas ~ and 90 DEG C; The consumption of the water in described Venturi Scrubber is: the first process gas of every cubic metre uses the water of 1 ~ 8L; The temperature of the water in described foam scrubber is lower than the temperature of described reprocessing gas 50 DEG C ~ and 90 DEG C.
10. stage purification method as claimed in claim 6, is characterized in that: from described Venturi Scrubber, effluent air is 15m/s ~ 25m/s in the inlet velocity of the second gas feed of described separator;
Water in described spray column, described Venturi Scrubber and described foam scrubber is that technique is purified waste water, one or more in process condensate water and outer water supply.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310631552.8A CN104667683B (en) | 2013-11-29 | 2013-11-29 | The stage purification equipment of dusty gas and the stage purification method of dusty gas |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310631552.8A CN104667683B (en) | 2013-11-29 | 2013-11-29 | The stage purification equipment of dusty gas and the stage purification method of dusty gas |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104667683A true CN104667683A (en) | 2015-06-03 |
| CN104667683B CN104667683B (en) | 2016-09-21 |
Family
ID=53303589
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310631552.8A Active CN104667683B (en) | 2013-11-29 | 2013-11-29 | The stage purification equipment of dusty gas and the stage purification method of dusty gas |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104667683B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107365607A (en) * | 2017-08-04 | 2017-11-21 | 上海米素环保科技有限公司 | A kind of compact natural gas suitable for offshore platform pre-processes purification method |
| CN108636018A (en) * | 2018-07-17 | 2018-10-12 | 华东理工大学 | A kind of the mixer wash mill and mixer washing system of dust-laden synthesis gas |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101302446A (en) * | 2008-06-06 | 2008-11-12 | 西安热工研究院有限公司 | Coal gas washing purification apparatus and process |
| CN202786150U (en) * | 2012-09-03 | 2013-03-13 | 神华集团有限责任公司 | Chilling washing system for raw gas gasified by dry pulverized coal |
-
2013
- 2013-11-29 CN CN201310631552.8A patent/CN104667683B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101302446A (en) * | 2008-06-06 | 2008-11-12 | 西安热工研究院有限公司 | Coal gas washing purification apparatus and process |
| CN202786150U (en) * | 2012-09-03 | 2013-03-13 | 神华集团有限责任公司 | Chilling washing system for raw gas gasified by dry pulverized coal |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107365607A (en) * | 2017-08-04 | 2017-11-21 | 上海米素环保科技有限公司 | A kind of compact natural gas suitable for offshore platform pre-processes purification method |
| CN107365607B (en) * | 2017-08-04 | 2023-04-18 | 上海米素环保科技有限公司 | Compact natural gas pretreatment purification method suitable for offshore platform |
| CN108636018A (en) * | 2018-07-17 | 2018-10-12 | 华东理工大学 | A kind of the mixer wash mill and mixer washing system of dust-laden synthesis gas |
| CN108636018B (en) * | 2018-07-17 | 2024-06-07 | 华东理工大学 | Mixer washing device and mixer washing system for dust-containing synthesis gas |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104667683B (en) | 2016-09-21 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| TWI446955B (en) | Process and apparatus for carbon capture and the elimination of multi-pollutants in flue gas from hydrocarbon fuel sources and the recovery of multiple by-products | |
| CN101732963A (en) | Multiphase flow smoke purifying process | |
| CN105597477A (en) | Device and method for removing ultrafine particles in flue gas of coal boiler | |
| EA030594B1 (en) | Removal of dust in urea finishing | |
| CN105214465A (en) | The apparatus and method of integration wet process of FGD dedusting | |
| US2621754A (en) | Gas scrubber | |
| CN104073296A (en) | Technology and device for dust removal purification of IGCC (Integrated gasification combined cycle) raw gas | |
| CN101721175B (en) | Bag type dust collector with novel air inlet mode and airflow distribution structure | |
| CN104667683A (en) | Graded purification device and graded purification method for dusty gas | |
| CN103866067A (en) | Blast furnace coal gas gravitational dust collector with cooling effect | |
| CN203777862U (en) | Multi-stage purification device for dusty gas | |
| CN105062574A (en) | Efficient combined dusty syngas washing dust removal device and method thereof | |
| CN105480980A (en) | Method and device for treating residue slurry resulting from trichlorosilane production | |
| CN204958841U (en) | Efficient combination formula dust -laden synthetic gas washing dust collector | |
| EP3140027B1 (en) | System and method for cleaning a gas stream from a urea plant solidification unit | |
| US2966431A (en) | Separation of filter material from carbon black | |
| CN110540173A (en) | method and device suitable for purifying reformed hydrogen | |
| CN205913928U (en) | Water -mist deduster | |
| CN205699958U (en) | Purification dust removal system | |
| CN201439517U (en) | Device for removing impurities in gas of pipeline | |
| CN208553531U (en) | A kind of the mixer wash mill and mixer washing system of dust-laden synthesis gas | |
| CN108295601A (en) | Dehydrator and efficient mist multi-cyclone dust pelletizing system | |
| CN110787564B (en) | System and method for jointly treating waste gas and waste water in limestone calcining process | |
| CN210915347U (en) | Recovery device of crude titanium tetrachloride | |
| CN116829241A (en) | System and method for dry adsorption |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |